Hipparchus

E112015
ancient Greek astronomer astrologer geographer human mathematician

Hipparchus was an ancient Greek astronomer and mathematician renowned for founding trigonometry and creating one of the first comprehensive models of the motions of the Sun and Moon.

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All labels observed (3)

Label Occurrences
Hipparchus canonical 6
Hipparchus of Nicaea 2
works of Hipparchus 1

Statements (47)

Predicate Object
instanceOf ancient Greek astronomer ⓘ
astrologer ⓘ
geographer ⓘ
human ⓘ
mathematician ⓘ
approximateValue anomalistic month ⓘ
draconic month ⓘ
length of the tropical year ⓘ
lunar distance ⓘ
synodic month ⓘ
associatedWith Nicaea ⓘ
Rhodes ⓘ
birthDate circa 190 BC ⓘ
birthPlace Greek Antiquity ⓘ
surface form: Ancient Greece

Bithynia ⓘ
Nicaea ⓘ
deathDate circa 120 BC ⓘ
deathPlace Rhodes ⓘ
era Hellenistic period ⓘ
field astronomy ⓘ
geography ⓘ
mathematics ⓘ
trigonometry ⓘ
influenced Claudius Ptolemaeus ⓘ
surface form: Ptolemy

ancient Greek astronomy ⓘ
development of trigonometry ⓘ
knownFor creating a star catalog ⓘ
developing models of the motions of the Sun and Moon ⓘ
discovering precession of the equinoxes ⓘ
early use of chords in a circle ⓘ
founding trigonometry ⓘ
improving the accuracy of astronomical observations ⓘ
introduction of epicyclic and eccentric models ⓘ
systematic use of trigonometric tables ⓘ
use of Babylonian astronomical data ⓘ
legacy considered one of the greatest ancient astronomers ⓘ
laid foundations for Ptolemaic astronomy ⓘ
name Hipparchus self-linksurface differs ⓘ
surface form: Hipparchus of Nicaea
notableMethod comparison of his observations with earlier star catalogs ⓘ
geometrical models with epicycles and eccentrics ⓘ
use of a chord table for trigonometric calculations ⓘ
usedSource Babylonian chronicles ⓘ
surface form: Babylonian astronomical records
workOn eclipses ⓘ
geographical coordinates ⓘ
lunar theory ⓘ
solar theory ⓘ
star positions ⓘ

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Ptolemaic system → influencedBy → Hipparchus ⓘ
Claudius Ptolemaeus → influencedBy → Hipparchus ⓘ
Almagest → influencedBy → Hipparchus ⓘ
Hipparchus → name → Hipparchus self-linksurface differs ⓘ
this entity surface form: Hipparchus of Nicaea
Strabo → influencedBy → Hipparchus ⓘ
Eudoxus of Cnidus → influenced → Hipparchus ⓘ
Mathematike Syntaxis → precededBy → Hipparchus ⓘ
this entity surface form: works of Hipparchus
Hellenistic astronomy → hasNotableAstronomer → Hipparchus ⓘ
Hipparcos satellite → namedAfter → Hipparchus ⓘ
subject surface form: Hipparcos
this entity surface form: Hipparchus of Nicaea